Ventilating device



May 8, 1828. 1,868,854

. A. N. LONGFIELD ET AL VENTILATING DEVICE Filed Sept. 5. 1925 Patented May 8, 1928.

` UNITED STATES PATENT oFFlCE.

ARCHIBALD N. LONGFIED `AND BERTHA. LONG-FIELD, OF ST. PAUL, MINNESOTA.

VENTILATING DEVICE.

Application ledlSeptember 5, 1925. `Serial No. 54,636.

This invention pertains to improvements in Ventilating devices, and its object is to provide a ventilator for closed vehicles of various kinds and other housings where a current of air passes on the outside.

Another object is to provide a ventilator having reversiblevanes which will automatically adjust themselves to the direction of the air currents and which can be governed as desired.

These and other objects will be apparent from the accompanying drawing and speciication.

In the drawing: Figure 1 is a horizontal section of a removable ventilatorI designed in accordance with our invention; i

Figures 2 and 3 are side elevations of the ventilator;

Figure 4 is a cross-section of the ventilator removably mounted;

Figure 5 is a cross-section of a builtin ventilator designed in accordance with our invention.

In carrying out this invention, we provide a tube 1, preferably rectangular in crosssection, and being pierced with a series of aligned slots 2. i Vanes 3 which are secured to shafts 11 and journaled to the tube l, are extended through the slots 2v into the said tube 1 about two-thirds of their length. `A case 4 which is somewhat shorter than the tube 1, is mounted over the extending portions of the vanes 3 and secured to the side of the said tube 1. The case 4 has its ends 5 closed, while its vertical side 6 is pierced with a series of slots 7. A plate 8, pierced with slots 9, corresponding to the slots 7 in the side 6, is slidingly secured to the said side G for a purpose to be later explained. The vanes 3 have their ends, which project into the tube l, secured to a rod 10 by means of links 14. Coil springs 12 are secured to each end of the rod 10 and to the tube 1, and control the angle of the vanes. A felt lining 18 is provided on the ends 5 and the upper and lower sides of the case 4.

In operation, theventilator may be mounted in any desiredplace, wherever there is a current of air, as for instance in the window of a moving vehicle such as an automobile, as shown in Figure 4. The current'of air enters the tube l and turns the varies 3 into the direction in which it is moving and thereby creates a suction, whichV draws the foul air out of the interior of the object in which it is installed. The coil springs 12 are provided to prevent a strong current tion regulated by the wind. In a case where the ventilator is used in a building, the vanes 3`will readily reverse themselves when the wind reverses itself.

The purpose of the slots 2 in the wall of i the tube 1 is to Aprotect the interior of the vehicle or building from sudden reversals of direction of the wind, since the air, in attempting to `pass through the case 4, will be `subjected to such a whirlingfmotion as to have its force vitiated, thus nullifying the ill effects otherwise to be experienced.

While we have herein deseribed'a certain specific manner `and method of constructing and assembling the elements of our inven* tion, it is understood that we may vary from the same in minor details, not departing from the spirit of our invention, so as best to construct a practical device for the purpose intended, as deiined in the appended claims.

We claim: 1 1. In a ventilator' for vehicles and `buildings, comprising a tube having a series of vanes journaled therein, the combination comprising the inner wall of said tube hav-- ing a plurality of slots, each of said vanes being adapted to have a portion thereof extended through one of the said slots, a case positioned on said inner wall, so as to form `an enclosure thereinbetween, said case havingv apertures communicating said enclosure Awith the interior o the vehicle or building,

and means for closing "said apertures.

2. In a ventilator for vehicles and buildings, the combination, with a tubehaving a series of vanes journaled therein, and means for maintaining said vanes parallel` .with one another, of means for vitiating Vthe force of back draft in said ventilator, said means comprising the inner Wall of said tube having a plurelity of s1otseaeh of said vanes being adapted to have a portion thereof ex- 5 tendedthroughone o said s1ots,.z1 @use positioned on said inner Wall so as to form an enclosure Vdiereinbetween, said case .having apertures communicating said enclosure with the interior of sind Vehicle or building. 10

In testimony whereof we aix our signw' tures.

ARCHIBALD N. LONGFIE'LD BERTI-IA I. LONG'FIELD. 

